diff --git a/xpcom/base/CycleCollectedJSContext.cpp b/xpcom/base/CycleCollectedJSContext.cpp
index d92283fb20..dc41421901 100644
--- a/xpcom/base/CycleCollectedJSContext.cpp
+++ b/xpcom/base/CycleCollectedJSContext.cpp
@@ -1477,7 +1477,9 @@ CycleCollectedJSContext::AfterProcessMicrotasks()
   }
   // Cleanup Indexed Database transactions:
   // https://html.spec.whatwg.org/multipage/webappapis.html#perform-a-microtask-checkpoint
-  CleanupIDBTransactions(RecursionDepth());
+  if(!mPendingIDBTransactions.IsEmpty()) {
+    CleanupIDBTransactions(RecursionDepth());
+  }
 }
 
 uint32_t